/*
 * ----------------------------------------------------------------------------
 * "THE BEER-WARE LICENSE" (Revision 42):
 * <phk@FreeBSD.org> wrote this file.  As long as you retain this notice you
 * can do whatever you want with this stuff. If we meet some day, and you think
 * this stuff is worth it, you can buy me a beer in return.   Poul-Henning Kamp
 * ----------------------------------------------------------------------------
 *
 * $Id: timepps.h,v 1.3 1998/06/13 09:30:24 phk Exp $
 *
 * The is a FreeBSD protype version of the "draft-mogul-pps-api-02.txt" 
 * specification for Pulse Per Second timing interfaces.  
 *
 */

#ifndef _SYS_TIMEPPS_H_
#define _SYS_TIMEPPS_H_

#include <sys/ioccom.h>

typedef int pps_handle_t;	

typedef unsigned pps_seq_t;

typedef struct ntp_fp {
	unsigned int	integral;
	unsigned int	fractional;
} ntp_fp_t;

typedef union pps_timeu {
	struct timespec	tspec;
	ntp_fp_t	ntpfp;
	unsigned long	longpair[2];
} pps_timeu_t;

typedef struct {
	pps_seq_t	assert_sequence;	/* assert event seq # */
	pps_seq_t	clear_sequence;		/* clear event seq # */
	pps_timeu_t	assert_tu;
	pps_timeu_t	clear_tu;
	int		current_mode;		/* current mode bits */
} pps_info_t;

#define assert_timestamp        assert_tu.tspec
#define clear_timestamp         clear_tu.tspec

#define assert_timestamp_ntpfp  assert_tu.ntpfp
#define clear_timestamp_ntpfp   clear_tu.ntpfp

typedef struct {
	int mode;				/* mode bits */
	pps_timeu_t assert_off_tu;
	pps_timeu_t clear_off_tu;
} pps_params_t;

#define assert_offset   assert_off_tu.tspec
#define clear_offset    clear_off_tu.tspec

#define assert_offset_ntpfp     assert_off_tu.ntpfp
#define clear_offset_ntpfp      clear_off_tu.ntpfp


#define PPS_CAPTUREASSERT	0x01
#define PPS_CAPTURECLEAR	0x02
#define PPS_CAPTUREBOTH		0x03

#define PPS_OFFSETASSERT	0x10
#define PPS_OFFSETCLEAR		0x20

#define PPS_HARDPPSONASSERT	0x04
#define PPS_HARDPPSONCLEAR	0x08

#define PPS_ECHOASSERT		0x40
#define PPS_ECHOCLEAR		0x80

#define PPS_CANWAIT		0x100

#define PPS_TSFMT_TSPEC		0x1000
#define PPS_TSFMT_NTPFP		0x2000

struct pps_wait_args {
	struct timespec	timeout;
	pps_info_t	pps_info_buf;
};

#define PPS_IOC_CREATE		_IO('1', 1)
#define PPS_IOC_DESTROY		_IO('1', 2)
#define PPS_IOC_SETPARAMS	_IOW('1', 3, pps_params_t)
#define PPS_IOC_GETPARAMS	_IOR('1', 4, pps_params_t)
#define PPS_IOC_GETCAP		_IOR('1', 5, int)
#define PPS_IOC_FETCH		_IOWR('1', 6, pps_info_t)
#define PPS_IOC_WAIT		_IOWR('1', 6, struct pps_wait_args)

#ifdef KERNEL
int std_pps_ioctl __P((u_long cmd, caddr_t data, pps_params_t *pp, 
	pps_info_t *pi, int ppscap));

#endif /* KERNEL */
#endif /* _SYS_TIMEPPS_H_ */